三菱鉛筆 Uni Jet Stream Prime High Grade Multi Ballpoint Pen - Refill - 0.5mm - Black - SXR-200-05 10 set

This ballpoint refill writes so smoothly as if it was a gel pen. Highly recommend! Just wish it was cheaper and came in more colours.

Love these refills for the Pengems pen. The ink works great on Tomoe River Paper (which is notoriously thin and smooth) and dries so quickly that I can immediately go over it with any highlighter. I repurchased this item, and it took me about a year and a half to get through my first order of refills. I wish I had more pens that used this refill.

書きやすいので、再度購入。

If you own a Uni Jet Stream Prime multi-pen or a pen that uses D1 refills, these refills are an easy recommendation. The 0.5mm tip lays down a consistently crisp, dark line with very little skipping or blobbing, problems that plague a lot of standard ballpoint refills. The ink is like a hybrid of ballpoint and gel and flows smoothly even on denser journal paper or standard printer paper. It also dries quickly enough to avoid smearing. Buying them in a 10-pack is the sensible approach since they're more economical than buying a single refill. Uniball Jet Stream refills are pricey when purchased individually. The main caveat is longevity. These refills tend to run out noticeably faster than comparable refills from other brands, which is a bit frustrating given the premium price point. For everyday lightweight writing tasks they're perfectly fine, but if you're someone who writes a lot throughout the day, you may burn through them more quickly than anticipated. The refills worked great in my Rotring 800 Pen with a D1 to Parker G2 adapter.

Perfect! I use these to refill my Kaweco Brass Sport. Love the flow, the ink, and the color. I also love that I have a bunch of them now.